Try to listen to events on ListView

Hi,

I am trying to show a custom view when the user is at the last item in my list (last message in chat app) and swiping up. I think i can do that with your lib but it doesn't work.

```
SimpleFingerGestures sfg = new SimpleFingerGestures();
sfg.setDebug(true);
sfg.setConsumeTouchEvents(true);

sfg.setOnFingerGestureListener(new SimpleFingerGestures.OnFingerGestureListener() {
@Override
public boolean onSwipeUp(int fingers, long gestureDuration, double gestureDistance) {
Log.d(TAG, "Swipe Up ----- Fingers: " + fingers + "\ngestureDuration: " + gestureDuration + "\ngestureDistance: " + gestureDistance);

return false;
}

@Override
public boolean onSwipeDown(int fingers, long gestureDuration, double gestureDistance) {

Log.d("Swipe", "Swipe Up Down ------ Fingers: " + fingers + "\ngestureDuration: " + gestureDuration + "\ngestureDistance: " + gestureDistance);
return false;
}

@Override
public boolean onSwipeLeft(int fingers, long gestureDuration, double gestureDistance) {
Log.d("Swipe", "Fingers: " + fingers + "\ngestureDuration: " + gestureDuration + "\ngestureDistance: " + gestureDistance);
return false;
}

@Override
public boolean onSwipeRight(int fingers, long gestureDuration, double gestureDistance) {

Log.d("Swipe", "Fingers: " + fingers + "\ngestureDuration: " + gestureDuration + "\ngestureDistance: " + gestureDistance);
return false;
}

@Override
public boolean onPinch(int fingers, long gestureDuration, double gestureDistance) {
return false;
}

@Override
public boolean onUnpinch(int fingers, long gestureDuration, double gestureDistance) {
return false;
}

@Override
public boolean onDoubleTap(int fingers) {
return false;
}
});

listMessages.setOnTouchListener(sfg);
```